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cannot convert data (type interface {}) to type string: need type assertion
... is an interface type, []i is not interface type. As a result, in order to convert []i to its value type, we have to do it individually:
// var items []i
for _, item := range items {
value, ok := item.(T)
dosomethingWith(value)
}
Performance
As for performance, it can be slower than dire...
What are the uses of “using” in C#?
... and Using objects that implement IDisposable (microsoft), the C# compiler converts
using (MyResource myRes = new MyResource())
{
myRes.DoSomething();
}
to
{ // Limits scope of myRes
MyResource myRes= new MyResource();
try
{
myRes.DoSomething();
}
finally
{
...
Convert an image to grayscale in HTML/CSS
...ry ones too if you feel like it, apply that class to any image you want to convert to greyscale (works in Firefox >3.5, IE8).
edit: Here's a nice blog post which describes using the new CSS3 filter property in SalmanPK's answer in concert with the SVG approach described here. Using that approa...
How to calculate the time interval between two time strings
...erence between the two times. You can do whatever you want with that, e.g. converting it to seconds or adding it to another datetime.
This will return a negative result if the end time is earlier than the start time, for example s1 = 12:00:00 and s2 = 05:00:00. If you want the code to assume the in...
How to recover MySQL database from .myd, .myi, .frm files
...
I found a solution for converting the files to a .sql file (you can then import the .sql file to a server and recover the database), without needing to access the /var directory, therefore you do not need to be a server admin to do this either.
It...
What is a rune?
...nt a rune code-point, a string value can also contain runes. So, it can be converted to a []rune, or vice versa.
The unicode package http://golang.org/pkg/unicode/ can give a taste of the richness of the challenge.
share
...
Convert JsonNode into POJO
...
In Jackson 2.4, you can convert as follows:
MyClass newJsonNode = jsonObjectMapper.treeToValue(someJsonNode, MyClass.class);
where jsonObjectMapper is a Jackson ObjectMapper.
In older versions of Jackson, it would be
MyClass newJsonNode = jso...
How to convert CharSequence to String?
How can I convert a Java CharSequence to a String ?
3 Answers
3
...
How to sort a list of strings numerically?
...d. I have a list of "numbers" that are actually in string form, so I first convert them to ints, then attempt a sort.
13 An...
Converting a list to a set changes element order
Recently I noticed that when I am converting a list to set the order of elements is changed and is sorted by character.
...